Portable tool-turning machine.



H. W. OSTER.

PORTABLE TOOL TURNING MACHINE.

APPLICATION FILED NOV. 23,1914.

7 Patented Oct. 3, 1916.

w///V M///////// /V///// 'Enz/rifoi W 7 9% a vise and HERMAN W. OSTEB, 0F CLEVELAND, OHIO, ASSIGNOR TO THE OSTER MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF'OHIO.

PORTABLE TOOL-TURNING MACHINE.

Specification of Letters Patent.

Patented Oct. 3, 1916.

Application filed November 23, 1914. Serial No. 878,434.-

machine, organized to do the work which a man is ordinarily required to do when he is away from his shop, to operate a r0 tatable tool. The machine, as shown, is especially organized to rotate a die. stock,

, which is a thread-cutting tool primarily intended for hand operation. The greatest field of usefulness for die stocks is for threading gas, steam and water pipes, for

installation in buildings. These pipes, or many of them, must becut to the proper lengths on the job, and cannot be threaded until so cut. They may then be taken back to the shop and threaded by power-driven thread-cutting machines, or, as is-the most common practice,-they may be clamped in threaded by manually operated die stocks. i

The primary object of this invention is to provide a portable self-contained ma-- chine which will hold the pipe while being threaded, and which will likewise turn an ordinary die stock,thereby doing the work of the man and the vise.

The invention consists in the construction and combination of parts shown .in the drawing and hereinafter described and pointed out definitely in the appended claims.

In the drawings Figure 1 is a; vertical,

central, longitudinal section of a machine embodying the invention; Fig. 2 is an end,

elevation from the left end of Fig. 1; and Fig. 3 is a top view of the outertool-engaging end of the rotatable member of the machine. 7

Referring to the parts by reference characters, 10 represents a'tubular frame member provided with suitable supporting legs 10*. Near one end this tubular frame member is enlarged to form a gear casing 10". This has'a removable end cap 10. This frame member serves as a work holder and is provided with means for securely gripping and preventing the revolution of the pipe P which passes through it. These work- 'scroll cam plate 18.

gripping devices are of'f'amiliar form in die stocks. They are radially movable bars .12,whose inner ends project, into the hollow center of the frame member. These workgripplng barsare provided with rack teeth l2 which are engaged by spiral cam scrolls on a rotatable cam plate 13 mounted on the frame member.

14 represents the tubular die stock operator. It is rotatlvely mounted in that end of the tubular frame member at which such casing is formed, and it'projects out beyond said end. It has on its projecting end two arms 15 which may be parallel with each other and with the axis of the members 14 and 10. Each of the outer parallel ends of these arms are formed with a slot 15.

Every die stock, one of which is represented conventionally by dotted lines in Fig. 1, is provided with two handles 16. These are the handles which the man ordinarily takes hold of to turn the die stock, and the slots 15* are so formed that these handles may slip into-them. Adj acentto these arms the project1ng part of the rotatable member 14 is provided with radially moving work-- allning bars 17 which are operatedby a These slotted arms are preferably formed as part of a head 19%, which 1s separately made but is fixed to, and becomes therefore a part of, rotatably mounted member 14.

A gear 19 is formed externally on the rotatable member 14 within the casing 10. Ad acent-tO it, and within this casing, is an other gear having the same diameter but having a different number of teeth. This gear is formed upon a. sleeve 20 which is fixed to the tubular frame member 10. 'A gear 21 is'rotatably mounted upon the member 14 within the gear casing. It carries a stud 22. on which a gear 23 is rotatably mounted. This gear engages both of the gears 19' and 20; When the gear 21 is turned, the member 14 will be turned slowly through the ditlerentialgearing above described.

25 is an electric motor which is secured upon the frame member 10. Its shaft 26 bers 10 and 14 and. allowed to project a suitable. distance into the head 19*. This pipe is clamped to the work-holding frame member 10 by the work gripping means described, and its projecting end is .alined and steadied by the bars 17. Then the die stock is placed in the embrace of the arms 15, as indicated, and the machine is set in operation. A Workman must press the die stock against the pipe until the dies of the die stock take hold and begin to cut the thread. After this, the continued turning of the die stock will. cause it to continue to cut threads on the pipe, and to advance along the pipe at a rate corresponding with pitch of the threads being cut.

Although the machine, as shown, is especially organized to operate die stocks, it is obvious-that it may, without change, be used to turn any rotatable tool having suitable handlesor projections for engagement with the arms 15; and also that slight changes 1n the shape of the head are all that should be required to adapt it to turn any rotatable tool which is usually actuatedby hand;

Having thus described my invention, what I claim is:

1. The combination-of non-rotating means i for holding Work, with a rotatable member provided with slots for engaging and turning a tool having .arms adapted to enter said slots, and means for turning said rotatable member.

2. The combination of a non-rotating tubular member provided with work gripping devices, a coaxial rotatable member which projects beyond the non-rotating tubular member, means provided at its said projecting end with two oppositely disposed arms in each of which is an open ended longitudinal slot, .and means for turning said rotatable member.

3. The combination of a tubular frame member having work-gripping devices, a tubular member supported by said frame member and in axial. alinement therewith, a

motor supported upon said frame member,

reducing gearing intermediate of said motor and rotatable member for turningthe latter, Work alining devices carried by said rotatable Inember,said rotatable member having at its outer end two oppositely disposed 'by said rotatable member, said rotatable member having at its outer end two oppositely disposed slotted toolengaging arms.

5.-The combination of atubular frame member having work-gripping devices, and having near one end an enlarged gear-protecting casing, a tubular member which projects into that end of the frame member at which the casing is formed and is rotatably mounted in said frame member with their axes in alinement, a motor supported on said frame member, a train of gears in said casing intermediate of the motorand rotatable member, work-alining devices carried by said rotatable member,said rotatable member having at its outer end means for engaging and turning a rotatable tool.

6. The combination of a tubular frame member, a tubular member rotatably supported by said frame member and projecting at one end beyond the same and having at the said projecting end two oppositely disposed arms provided with means for en gaging and turning a tool, a motor supported upon said frame' member, and reducing gearing intermediate of said motor and said rotatable member for turning the latter.

In testimony whereof, I hereunto aflix my signature in the presence oftwo witnesses.

HERMAN W. OSTER. 

